Automatic burglar and fire alarm.



J. P. R UMPF.

' AUTOMAHC BURGLAR AND FIRE ALARM.

APPLlCATlON FILED OCT. 5, 1914.

1 346,47 1 Patented Nov. 13, 1917.

FUKNRCE A nah/v5 rs srAT sPATE T OFFIfiE- JOHN P. noun, or BALTIMORE,mnrnm.

AUTOMATIC BURGLAZR, AND FIRE Specification of Letters Patent.

Application filed October 5, 1914. Serial No. 865,150.

To all whom it may concern:

Be it known that 1, JOHN P. RUMPF, a citizen of the United States, and aresident of Baltimore and State of Maryland, have invented a new anduseful Improvement in Automatic Burglar and Fire Alarms, of which thefollowing is a specification.

My invention relates to improvements in automatic burglar and firealarms and has for its object to improve and simplify the constructionof burglarand fire alarms, and to provide an efficient and inexpensivedevice of the character which shall be positive reference being had tothe accompanying drawings, in which I v Figure 1 is an elevation showingmy improvement as applied for use as a burglar alarm, v

Fig. 2 is a similar view showing use as a fire alarm.

Fig. 3 is a side elevation of the circuit closer,

Fig. 4i's a sectional end elevation on line 44 of Fig. 3, and

Fig. 5 is a sectional view showing the cold clamping means.

In carrying out my invention I use a baseboard suitably insulated andsecured to the wall or other part of a room by means of screws orotherwise; mounted on this base board arethe contact arms M, M of acircuit closing mechanism, said arms bein formed of thln strips ofspring metal pre erably brass and spaced apart from each other asuitable distance and secured to the insulated block C at -one end; atthis end the contact arms are connected to the terminals of a bellcircuit D; the free ends of the con tact arms M, M are normally apartthrough their own resiliency lying substantially parallel, and the upperarm has near its outer end a protuberance m on its inner face oppositethe inner face of the opposing contact arm M. y

Mounted on the baseboard to slide vertically is the circuit closingdevice J which as shown in Figs. 1, 2 and 3 lies against Patented Nov.13, 1917.

the baseboard and may slide vertically thereon. The upper end of J isprovided with a.

hole or opening to which is attached a cord G, which passes to andthrough the guide eye e, thence through another guide 6 fastened to oneside of a window frame'W and thence across to the other side of a windowframe where it is securely fastened as at a this cord it will be noticedpassesta across the open space below the lower sash ofthe window, sothat should a person attempt to get under the cord it will be raised ormore likely broken, as the cord is to be a very light and weak one; ifthe person attempted to get over the cord or put pressure on it fromabove it will be forced downward or break; in either event the slide Jwill cause the contact arms to come together, as should the cord bebroken the slide will drop by gravity and force the upper arm M with itsprotuberance m against the lower arm, thus closing the circuit andcausing the bell to ring; if the cord is forced upwardly or downwardlyand does not break, the slide will be the lower contact arm M againstthe upper arm M and thus completing the circuit and ringing the bell.The slide J may be made of any suitablematerial.

In Fig. 2 is shown the manner in which my device may beused as a firealarm; when so used, the cord G is disposed so that it passes just abovea furnace or other heating member I and upon fire breaking out orover-heating, the cord is burnt and becomes ruptured, releasing circuitclosing slide J and closing the circuit through the arms M, M andsounding the alarm.

In the drawing 1 have shown a modified form of the device in which thecircuit cl0s ing slideconsists of :a weighted upper portion J connectedto the lower portion J, by an insulated strip J 2 which passes throughalined openings on m, in sprin contact arms M M as plainly shown in igs.3 and 4, the slide member "beingheld in its normal position by the cordL, which is applied as shown in Figs. 1 and 2.

As seen in Figs. 1, and 2 a stop N is located beneath the slide so thatsaid slide pulled upwardly forcing pin may be passed through the hole atthe upper end of J and rest on the top of the baseboard.

Thus it will beseen that when the cord L breaks the weight of the upperpart or abutment J bearing on the upper contact arm causes it to engagethe lower contact arm and thus closethe circuit and cause an alarm; whenthe cord is pulled upwardly the action is the same, namely, the lowerpart or abutment J lifts the lower contact arm against the upper contactarm and closes the circuit.

To hold the cord so that the device will not operate, as during thedaytime or when not needed, I use a cord clamp consisting of a cam Pmounted vertically on the bracket Q secured to the Wall adjacent theguide eye 0, said cam having a handle P extending laterally from theupper end thereof as shown in Figs. 1 and 6. 'By throwing the handle 'toone side the same forces the cord against the bracket and holds itsecurely in place; to release the cord so that it may act with the otherparts of the device, the

handle I is thrown to the other side.

I claim:

A circuit closer for use in an open alarm circuit consisting of twomovable contacts normally spaced apart and having alined verticalopenings therethrough, a slide movable transversely with respect to thecontact arms and consisting of a pair of abutments spaced apart and onopposite sides of the contacts, an insulated strip connecting saidabutments and passing through the aforesaid o enings in the contactarms, and a cord rigi 1y secured at one end and at its other end to theupper end of the slide.

JOHN P. RUMPF. Witnesses: Gao. S. BRoeK,

\ WM. H. HADAWAY.

